Active-Reactive Power Coordinated Dispatching Method for Active Distribution Network Based on Second-Order Cone Model

Abstract

Active distribution network (ADN) will integrate a large number of flexible resources to cope with the integration of a high proportion of distributed power (DG). Because there are complex time and space coupling relationships among flexible resources, the traditional active-reactive power dispatching strategy is no longer applicable. In order to effectively consume renewable power, this paper proposes a day ahead economic dispatching method considering flexible resources. Its characteristic is that on the basis of relaxation power flow, the reactive power support and power loss of energy storage (ES) are effectively considered through the constraint of cone form. Through the case study of the improved IEEE 33 node, it is found that the coordination of active and reactive power can be taken into account when the power grid operation conditions are established in the form of cone constraints. The operating voltage of the power grid keep in a perfect range.